The room suddenly became silent, and Yin Yu's voice sounded. "Who?"

"I."

"The general is here, the general is here." Yin Wei said repeatedly, mixed with a few strange voices with a little panic. "What should I do, what should I do?"

"Hide, hide."

"Where to hide?"

"Behind the bed, go in, go in."

The sound in the room was very small, but Sun Ce had very good ears. He should have turned around and left, but when he saw Huang Yueying and Yin Wei didn't want him to know, he wanted to see who it was. He pretended not to hear and continued to knock on the door. After a while, the door creaked and opened a crack, revealing Yin Wei's half-red face.

"General, why are you here?"

"Can't I come?" Sun Ce asked back, then noticed that the room was as warm as spring, and the heating was coming, and his face, which was frozen by Ye Han, immediately regained consciousness. He frowned and rubbed his hands. "Why is the room so warm?"

"Uh... Sister Achu has done floor heating."

"The ground... warm?" Sun Ce almost bit his tongue. So tall and upright? He was already surprised when he saw the window. There was no window paper in this era. The windows were connected inside and outside, but were separated by patterned wooden lattices. Even rich families were willing to use silk, but they had to use soft cloth to block it in winter because the silk was not heated. Huang Yueying did not use soft cloth to block it, so she continued to use silk. It turned out that there was floor heating and was not afraid of the cold.

Sun Ce raised his eyebrows. "You blocked the door and refused to let me in. I'm afraid I'll waste it when I see you? Now the whole city has implemented wartime quotas, and you actually hide here and use floor heating. How much firewood should you use?"

"Who said I used firewood?" Huang Yueying squeezed over and opened the door. Her little face raised high, unable to hide her pride. "Come in and see if I have burned a piece of wood."

Sun Ce stepped into the room, glanced at him and saw five sets of stationery on the huge desk in the middle. He glanced at the curtain of the bed trembled gently, and listened carefully to the sound of slight breathing. He pretended not to see it, and circled around the desk, but did not find any stove, nor could he see a piece of firewood, only a few rows of thick copper tubes were clothed in the corners of the wall, emitting heat.

"Did you see the firewood?" Huang Yueying shook her head and was proud.

"I didn't see Mu Chai, but I saw a good calligraphy." Sun Ce picked up a bamboo slip, looked at the silk handwriting on it, and praised: "Is this Ah Yu's character? If you haven't seen it for more than a month, your calligraphy has made great progress."

Yin Qi's eyes were lively. "Hehe, I can't write so well."

"Is that Achu's? It's not like it. Achu's calligraphy has an ancient style, but it's not as beautiful as it is."

Huang Yueying curled her lips and rolled her eyes. "What ancient style? If I say that I don't write well, it's not good, and I'm just a bit weird. I know that your calligraphy is good, and I don't like the words I wrote. Let me tell you the truth. This calligraphy has other people. Not only is it good, but it looks better, it just won't let you read it."

Sun Ce laughed. "No wonder there are five pairs of pens and ink. It turns out that there are still people there, so I won't disturb you. Ah, are you going to sleep today? If you go back, just go with me and talk to you by the way. If you don't go back, I will leave alone. It's cold at night, be careful and don't freeze."

Yin Gui squeezed his eyes at Huang Yueying and smiled, "Achu, you guys chat slowly, I'll go back first, come tomorrow." As he said that, he picked up the clothes hanging beside him and followed Sun Ce out of the door. Huang Yueying raised her head and turned her eyes, but she didn't look at Sun Ce. Sun Ce held back her laughter, walked to the door, and turned back and said, "Achu, you are too, don't freeze."

"Don't worry." Huang Yueying glanced at Sun Ce and couldn't help laughing.

Sun Ce raised his hand and brought the door. When he walked to the yard, Huang Yueying opened the window and asked, "Don't you want to know what I use to keep warm?"

Sun Ce stopped and thought for a while. "Since it's not firewood, is it coal?" He knew that Nanyang produced coal and it was used for iron smelting in the Han Dynasty.

"Guess again."

"Then..." Sun Ce raised his head. "Is it sunlight?" If Huang Yueying knew how to use solar energy at this time, it would be too amazing.

"Nonsense! There is no sunshine at night. Let me tell you, it's the ground meat."

Dizhi? Sun Ce quickly searched in his mind. Huang Yueying should be talking about oil, but does Nanyang have oil? This is really not clear. The historical materials of the Qin and Han dynasties he has read also did not have any information related to oil. If Nanyang has surface oil, it might be a huge help to the upcoming war.

Sun Ce's heart moved, and quickly walked to the window, looking across the window with Huang Yueying. He was one head taller than Huang Yueying. At that moment, he saw a slim figure and a beautiful face from the crack of the window - the most beautiful face he had seen so far. He was stunned for a moment and stared at the woman. The woman felt his gaze. When she looked up, she saw Sun Ce staring at her, she was surprised, and her phoenix eyes were wide open. She raised her hand and covered her mouth, and suddenly drilled behind the bed curtain. She disappeared for a moment, leaving only the bed curtain shaking gently.

Sun Ce felt lost.

Huang Yueying raised her head and saw that he was in a daze. She looked back and saw that she was empty, so she raised her hand and shook it in front of Sun Ce. "What are you looking at?"

Sun Ce came to his senses, lay on the windowsill, facing Huang Yueying, blinking his eyes. "Did the ground fat you mentioned come out of the ground, black, sticky, and a strange smell?"

Huang Yueying was surprised. "Have you seen it?"

Sun Ce smiled and did not answer Huang Yueying's words. "Achu, do you know that the earthly lipid you mentioned has another name."

"What's the name?"

“Liquid gold.”

Huang Yueying took a breath of air conditioning and covered her mouth with her hands. "You mean, what I use to keep warm is a treasure as precious as gold?"

"This is not yet considered a gold mine that can flow at most." Sun Ce raised his hand and squeezed Huang Yueying's nose and shook it gently. "Burn, if burning some ground fat can warm you up, read a while, come up with a wonderful idea to extract the liquid gold from the ground fat, it is still worth it." He paused and said, "Achu, look, this is the power of knowledge. A true scholar, even a woman, may change an era and exert unimaginable power."

"Really?" Huang Yueying's eyes were bright, like a star in the night sky. She looked very weak, but it was the real starting point of light.

"Really." Sun Ce waved his hand. "But don't worry, it's not too late to think about this matter when you repel the people of Xiliang. This matter cannot be done in a day or two, and may last for a lifetime."

Huang Yueying clenched her fists and cheered herself up. "I must extract the gold from the ground fat."

Sun Ce touched Huang Yueying's head and rubbed her hair. "Go to bed early, don't catch a cold, take good care of yourself. You are my gold medal."
Chapter completed!